CN1275497C

CN1275497C - Flat acoustic transducer

Info

Publication number: CN1275497C
Application number: CNB008087865A
Authority: CN
Inventors: 铃木孝久; 堀昌司; 大林国彦
Original assignee: FPS Inc
Current assignee: FPS Inc
Priority date: 1999-06-11
Filing date: 2000-06-09
Publication date: 2006-09-13
Anticipated expiration: 2020-06-09
Also published as: EP1194001A4; EP1194001A1; WO2000078095A1; KR100522384B1; CN1356016A; US7174024B1; KR20020003573A; TW465249B; MY128369A; HK1047675A1

Abstract

Flat, quadrangular permanent magnets m18, m28, m38 are disposed on a yoke 20 with their magnetic pole faces facing upward and so as to be adjacent to one another or contact one another, and such that magnetic pole faces of different polarities are disposed alternately. A vibrating membrane 26 is disposed on a top surface side of the yoke 20 so as to be parallel to the magnetic pole faces of the permanent magnets. Coil pairs L18, L28, L38, which are wound in helical forms and are disposed at front and reverse surfaces of the vibrating membrane, are disposed on the vibrating membrane 26 so as to correspond to the permanent magnets m18, m28, m38. The coil pairs L18, L28, L38 are wound in helical forms so as to be formed substantially similarly to outer edges of the magnetic pole faces of the permanent magnets m18, m28, m38. Inner peripheries of the helices of the coil pairs are disposed at outer sides of regions which include positions corresponding to centers of the magnetic pole faces, and outer peripheries of the helices of the coil pairs are disposed so as to overlap one another. Because the permanent magnets are disposed on the yoke so as to be adjacent to or contact one another, magnetic flux traveling in a direction substantially parallel to a surface of the vibrating membrane becomes a maximum, and interlinks with the coil pairs. When current is supplied to the coils, a direction of force which the current receives from a magnetic field is a direction substantially orthogonal to the surface of the vibrating membrane, and force in a direction along the surface of the vibrating membrane becomes extremely low. Thus, noise components can be reduced such that sound quality can be improved.

Description

Flat acoustic transducer

[technical field]

The present invention relates to flat acoustic transducer, relate in particular to the flat acoustic transducer that can be used as plane loud speaker, plane microphone, can be used as plane loud speaker that microphone uses etc.

[background technology]

Fig. 1 represents the basic structure of existing plane loud speaker.This plane loud speaker has: be configured in side by side a plurality of bar-shaped magnet 1 on the yoke 4, near and the vibrating membrane 2 that be arranged in parallel with the magnetic pole strength of these bar-shaped magnets 1, be respectively formed on the vibration face with the corresponding position of the magnetic pole strength of bar-shaped magnet on with a plurality of coils 3 of the direction upper reaches overcurrent of the magnetic field orthotropic that produces by bar-shaped magnet 1.Each coil 3, the major part of interior all sides of coil are configured on the position relative with the magnetic pole strength of bar-shaped magnet, and remainder is configured in than the position corresponding with the outer rim of bar-shaped magnet to the more lateral.Vibrating membrane is by the fixing periphery of vibrating membrane of fixed part, vibrating with coil.And, by in each coil 3, flowing through alternating current, the electric current that flows through each coil 3 according to the faraday left hand rule is stressed from the magnetic field of bar-shaped magnet, thus make vibrating membrane 2 with the coil of energising with the direction of vibration face quadrature on vibrate, thereby be acoustic signal with converting electrical signal.

By make vibrating membrane 2 with the direction of vibration face quadrature on vibrate, according to the faraday right-hand rule acoustic signal is transformed to the signal of telecommunication, can be used as microphone.

But, in the above-mentioned existing plane loud speaker, the major part of configuration coil on the position relative with the magnetic pole strength of bar-shaped magnet, thus had an effect in the magnetic field of the direction that is configured in locational coiler part relative with the magnetic pole strength of bar-shaped magnet and vibration face quadrature.Therefore, flowing through power that the electric current of this coiler part is subjected to from magnetic field is along the direction of vibration face.Power along this vibration face direction produces distortion on vibrating membrane, for acoustic signal, become the noise composition, thereby the problem that tonequality reduces occurs.

Because a plurality of bar-shaped configurations of magnets are become parallel longitudinal, with the length of the part of the magnetic field interlinkage of each coil be the long limit of bar-shaped magnet and coil turn long-pending about 2 times, low with the occupied area ratio of the relative vibrating membrane area of coil magnetic field interlinkage part, therefore, sound equipment conversion efficiency variation, occur not only can not get sufficient volume, but also can not get the problem of sufficient tonequality.

The shape of loud speaker is determined by the length of bar-shaped magnet and the configuration number of bar-shaped magnet, the loudspeaker shapes design freedom is limited, and since along bar-shaped magnet vertically to each bar-shaped configurations of magnets coil, therefore, have to be set to and owe problem flexibly aspect the appropriate value at resistance value with loud speaker.

And, in the above-mentioned existing plane loud speaker, the distance of magnetic pole strength and the bar-shaped configurations of magnets gap from the vibrating membrane to the yoke from vibrating membrane to bar-shaped magnet only be bar-shaped magnet thickness apart from difference, therefore, produce phase difference at the back magnetic pole strength that produces from vibrating membrane and from the sound of each yoke reflection arrival vibrating membrane.Thereby vibrating membrane distorts with acoustic pressure that should phase difference is distributed, and for acoustic signal, becomes the noise composition, the problem that tonequality reduces occurs.

For addressing this problem, consider between vibrating membrane and magnetic pole strength flexible materials such as filling sponge, but the vibration vibration of membrane is subjected to the obstruction of this flexible material, has especially reduced the tonequality of low range.

Because a plurality of bar-shaped configurations of magnets are become parallel longitudinal, with the length of the magnetic field interlinkage part of each coil be the long limit of bar-shaped magnet and coil turn amass about 2 times, reduce with the occupied area ratio of the relative vibrating membrane area of coil magnetic field interlinkage part, so sound equipment conversion efficiency variation, occur not only can not get sufficient volume, but also can not get the problem of sufficient tonequality.

And in the above-mentioned existing plane loud speaker, vibrating membrane produces the gap near the configuration of the magnetic pole strength of bar-shaped magnet between vibrating membrane and the magnetic pole strength, the problem of plane loud speaker self thickening occurs making.

When the shape of above-mentioned existing plane loud speaker became big spindle, vibrating membrane produced lax, and this vibrating membrane is no longer parallel with yoke.Therefore, from each point on the vibrating membrane to yoke or the distance of the magnetic pole strength of bar-shaped magnet different.As a result, phase difference appears in the reflect sound that is turned back to vibrating membrane by reflections such as yokes once more, and vibrating membrane distributes with this acoustic pressure and distortion occurs, the problem that appearance generation noise, tonequality reduce.

The present invention makes for addressing the above problem, and first purpose provides a kind of flat acoustic transducer, reduces the distortion of vibrating membrane and reduces the noise composition.

Second purpose of the present invention provides a kind of flat acoustic transducer, and the length of the part of lengthening and coil magnetic field interlinkage improves the occupied area ratio that the vibration face is reached the standard grade and enclosed, and improves the sound equipment conversion efficiency, further improves tonequality again.

The 3rd purpose of the present invention provides a kind of flat acoustic transducer, and the length of the part of lengthening and coil magnetic field interlinkage improves the occupied area ratio that the vibration face is reached the standard grade and enclosed, and improves the sound equipment conversion efficiency, further improves tonequality again.

The present invention makes for addressing the above problem, and its 4th purpose provides the thinner flat acoustic transducer of a kind of thickness.

The present invention makes for addressing the above problem, and its 5th purpose provides a kind of plane speaker unit, no matter the vibrating membrane shape how, can both be exported the sound of high-quality all the time.

[disclosure of the Invention]

For achieving the above object, the flat acoustic transducer of first invention comprises: first magnet that is configured to first magnetic pole strength and predetermined surface almost parallel; With second magnet that described first magnet interval predetermined distance is provided with, the feasible second magnetic pole strength relatively described predetermined surface almost parallel different with the polarity of described first magnetic pole strength, and towards the side identical with first magnetic pole strength of described first magnet; Be configured to the vibrating mass relative with second magnetic pole strength with described first magnetic pole strength; Form helical form, be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place first coil of spiral inner periphery and the outer periphery simultaneously with described first magnetic pole strength; Form helical form, be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place second coil of spiral inner periphery and the outer periphery simultaneously with described second magnetic pole strength.

First configurations of magnets of first invention becomes first magnetic pole strength and the predetermined surface almost parallel of first polarity (for example N utmost point).Second magnet and described first magnet predetermined distance at interval are provided with, and make the relative predetermined surface almost parallel of second magnetic pole strength of second polarity (for example S utmost point) different with first polarity, and towards the side identical with first magnetic pole strength of first magnet.First magnet and second magnet are configurable on predetermined surface, but also support periphery such as available framework disposes.The vibrating mass that is made of vibrating membrane or oscillating plate is configured to relative with this predetermined surface.In the whole invention, vibrating mass is made of vibrating membrane or oscillating plate.

In accordance with regulations at interval under the situation of separate configuration first magnet and second magnet, effect is that first coil configuration is become to place the spiral inner periphery and the outer periphery on the position at the corresponding position of the outer rim with first magnetic pole strength that clamps vibrating mass, simultaneously, second coil configuration is become on the position at the corresponding position of the outer rim that clamps vibrating mass, place the spiral inner periphery and the outer periphery with described second magnetic pole strength.

Configuration forms spiral helicine first coil and second coil on this vibrating mass.First coil configuration on the position corresponding of vibrating mass with first magnetic pole strength so that magnetic line of force interlinkage.Second coil and first coil are same, also are configured on the position corresponding with second magnetic pole strength of vibrating mass so that magnetic line of force interlinkage.

Thus, the magnetic line of force that produces from each magnet from first magnetic pole strength towards second magnetic pole strength or from second magnetic pole strength towards first magnetic pole strength, thereby the magnetic line of force in the zone between first magnetic pole strength and second magnetic pole strength, and the magnetic line of force in the zone between first magnet and second magnet towards with the direction of vibrating mass face almost parallel.

On first magnetic pole strength of vibrating mass and second magnetic pole strength, one side, dispose the flexible air layer and form parts to form the air layer of specific thickness with vibrating mass.Form parts by the configuration air layer, the sound that produces from vibrating mass forms the parts reflection by air layer, arrive vibrating mass once again, but form the air layer that forms specific thickness between the parts at vibrating mass and air layer, thereby in reflect sound, do not produce phase difference, therefore, vibrating mass does not produce distortion, acoustical sound.

Even when contact configuration first magnet and second magnet,, do not produce distortion in the reflect sound from not producing phase difference in the reflect sound of magnetic pole strength, but the hardness height of magnet self, thereby reflectivity uprises, reflect sound uprises.Among the present invention, configuration flexible air layer forms parts, makes and can reduce reflect sound.

Like this, each of first coil and second coil is configured to interlinkage on the position corresponding with first magnetic pole strength of vibrating mass and second magnetic pole strength, or as above explanation is such, the magnetic line of force in the zone between first magnet and second magnet towards with the direction of vibrating mass face almost parallel, thereby acting on from the part that is cross over periphery interior week of joining with second coil of first coil and from the part that is cross over periphery interior week of joining with first coil of second coil towards with the magnetic line of force of the direction of vibrating mass face almost parallel.

Therefore, when first coil and the second coil midstream overcurrent, stressed direction becomes and the vibrating mass face direction of quadrature roughly electric current from magnetic field, reduces along the power of the direction of vibrating mass face, therefore, can reduce the noise composition, improves tonequality.

If with vibrating mass be configured near and in the face of first magnetic pole strength and second magnetic pole strength, then act on first coil and second coil between the magnetic line of force that intersects on the part that link towards with the direction of vibrating mass face almost parallel increase, thereby better.

By in the part of joining with first coil of the part of joining with second coil of first coil and second coil, flowing through the electric current of equidirectional, flow through from the part that is cross over periphery interior week of joining with second coil of first coil and the electric current from each of the part that is cross over periphery interior week of joining with first coil of second coil direction stressed from magnetic field identical, thereby can produce the acoustic signal of big volume.

Cross the electric current of equidirectional at each coil midstream, can be independently in each coil midstream overcurrent, but as following explanation, can in the part of joining with first coil of the part of joining with second coil of first coil and second coil, flow through the electric current of equidirectional.That is, when the coiling direction of first coil and second coil is equidirectional from periphery is inwardly all, shown in Fig. 2 A and Fig. 2 B, between the first coil L1 and the second coil L2, connects or between the periphery of the first coil L1 and the described second coil L2, connect.

When the coiling direction of first coil and second coil differed from one another from inside week of periphery, shown in Fig. 3 A and Fig. 3 B, connect the interior all sides of one of the first coil L1 and second coil L2 and another outer circumferential side or shown in Fig. 3 C, between interior all sides of the first coil L1 and the second coil L2, connect and between outer circumferential side, connect.

The flat acoustic transducer of second invention comprises: first magnet that is configured to first magnetic pole strength and predetermined surface almost parallel; With second magnet that described first magnet interval predetermined distance is provided with, the feasible second magnetic pole strength relatively described predetermined surface almost parallel different with the polarity of described first magnetic pole strength, and towards the side identical with first magnetic pole strength of described first magnet; Be configured to the vibrating mass relative with described predetermined surface; Form helical form, be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place first coil of spiral inner periphery and the outer periphery simultaneously with first magnetic pole strength; Form and the rightabout spiral helicine while of described first coil, be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass to place the spiral inner periphery and the outer periphery with described first magnetic pole strength, be configured in described vibrating mass with the described first coil position overlapped on and second coil that is connected of interior week end of described first coil of interior Zhou Duanyu; Form the spiral helicine while with the described second coil equidirectional, be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place the spiral inner periphery and the outer periphery with described second magnetic pole strength, be configured on the described vibrating mass, and the tertiary coil that is connected with the outer circumference end of described second coil of outer circumference end; Form the spiral helicine while with the described first coil equidirectional, be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass to place the spiral inner periphery and the outer periphery with described second magnetic pole strength, and be configured in described vibrating mass with described tertiary coil position overlapped on, the 4th coil that is connected of interior week end of the described tertiary coil of interior Zhou Duanyu.

In second invention, described first coil configuration is on the one side of described vibrating mass, described second coil configuration is on the another side of described vibrating mass and hold the described vibrating mass of perforation to be connected with holding in interior week of described first coil in interior week, described tertiary coil is configured on the described another side of described vibrating mass, and described the 4th coil configuration is on the described one side of described vibrating mass and hold the described vibrating mass of perforation to be connected with holding in interior week of described tertiary coil in interior week.Like this, by on the vibrating mass two sides, disposing coil, can effectively utilize vibrating mass.

The interior Zhou Duan and the holding in interior week of second coil of first coil are connected, the interior Zhou Duan of tertiary coil and holding in interior week of the 4th coil are connected, connect second coil and tertiary coil with outer circumference end, thereby available continuous single line forms coil.

In second invention, first coil, second coil, tertiary coil and the 4th coil as a coil groups, are connected the outer circumference end of first coil of adjacent coil groups with the outer circumference end of the 4th coil, like this, configurable a plurality of such coil groups.At this moment, flow through the electric current of equidirectional on one side between the coil of adjacent coil groups of configuration, therefore, can raise the efficiency, greatly reduce the generation of noise etc. simultaneously.

Can be on the thickness direction of coil a plurality of above-mentioned coil groups of stacked arrangement.

When contact configuration first magnet and second magnet, effect is that first coil is become the interior week that spiral is set respectively laterally from the zone that comprises the position corresponding with center described magnetic pole strength described vibrating mass with second coil configuration, and it is not overlapped with periphery, be about to described first coil configuration at the position corresponding from the outer rim with described first magnetic pole strength of described vibrating mass to leaving the zone the position of predetermined distance with the direction at corresponding position, the center of described first magnetic pole strength, simultaneously, with described second coil configuration at the position corresponding from the outer rim with described second magnetic pole strength of described vibrating mass to leaving the zone the position of predetermined distance with the direction at corresponding position, the center of described second magnetic pole strength.

Above-mentioned each invention dispose a plurality of magnets that constitute along described first magnet of first direction alternate configurations and described second magnet and is listed as, and makes on the second direction of intersecting with described first direction described first magnet and the described second magnet alternate configurations.By such configuration, a plurality of first magnets are become rectangular with a plurality of second configurations of magnets.Be configured to when rectangular, dispose first and second coils or first～the 4th coil corresponding to first magnet of configuration and each of second magnet.

As mentioned above, by a plurality of first magnets are become rectangular with a plurality of second configurations of magnets, with and the situation of the bar-shaped magnet of row arrangement compare configurable more magnet.Many times of coil number or magnet number identical with the magnet number are disposed, make length summation lengthening with the part of the magnetic line of force interlinkage of coil, improve the ratio of the occupied area of the coil on the vibrating mass face, improve the sound equipment conversion efficiency, and further improve tonequality.

As mentioned above, when a plurality of first magnets are become rectangular with a plurality of second configurations of magnets, as mentioned above, and as Fig. 2 A, 2B and Fig. 3 A, 3B connects the first coil L1 and the second coil L2 shown in the 3C.

In addition, when disposing a plurality of first magnets and a plurality of second magnet, as Fig. 2 A, 2B and Fig. 3 A, 3B, shown in the 3C, the coil groups that constitutes with first coil that is connected in series and second coil is a unit, shown in Fig. 3 C, can be connected in parallel.

As mentioned above, be connected a plurality of coils with in parallel with mixing, the impedance of plane loud speaker can suitably be set by serial or parallel connection or series connection.So free connecting coil for a coil or connect a plurality of coils, forms a coil groups.Therefore, a plurality of coil groups of configuration are connected in this coil groups with each signal source in the plane loud speaker, make 1 plane loud speaker produce multichannel source of sound or stereo source of sound.Certainly, all coils group can be connected in single signal source.

First magnet and described second magnet shape one of at least is multiple shape.At this moment, first coil and second coil form the shape of reeling, with the appearance similar of first magnet and second magnet.Being shaped as when multiple of magnet cooperates the shape of flat acoustic transducer to dispose first magnet and second magnet, thereby is applicable to the flat acoustic transducer of Any shape, increases the freedom of design in configuration of whole acoustic transducer.

The shape of above-mentioned magnet and coil can also be triangle, pentagon, hexagon, other polygonals, circle, ellipse and free shape such as unsetting except that square shape.For example, as shown in Figure 4 near to or in contact with or separate predetermined distance ground triangle, quadrangle and other polygonal magnet m be configured to rectangular.By on the vibrating mass face, disposing spiral helicine coil L1 accordingly with each magnet, make along the orientation between each magnet and along the magnetic line of force quadrature of the direction of vibrating mass face, can freely design the shape of whole acoustic transducer, profile and present variform acoustic transducer can be constituted, impedance can be mildly set.

By making up such shape and arrangement, compare with the situation of a plurality of bar-shaped magnets side by side, dispose the little magnet of a plurality of magnetic pole strengths, increase the occupied area of the coil around each magnet, compare with the situation of using bar-shaped magnet, to the actuating force increase and the homogenizing of vibrating mass.Therefore, the signal of telecommunication improves to the conversion efficiency of acoustic signal, and tonequality also improves.

As shown in Figure 5, the magnet of equilateral triangle is approaching, contact or separate predetermined distance and be arranged to the equilateral triangle shape, formation is under the situation of loud speaker of acoustic transducer of equilateral triangle shape as profile, does not interfere mutually from the sound wave of each limit reflection of loud speaker, thereby especially improves tonequality.Triangle is not limited to above-mentioned equilateral triangle shape, can be the right angle trigonometry shape.

Above-mentioned first magnet and second magnet are configurable on the plate-shaped member that magnetic constitutes.By disposing magnet on the plate-shaped member that constitutes at magnetic, as magnetic circuit, nearly all magnetic line of force all passes through in this magnetic circuit with plate-shaped member, do not leak into the outside, thereby, the high magnetic line of force of density produced on first magnetic pole strength and the second magnetic pole strength side, thus, can produce the acoustic signal of big volume.At this moment, by making the magnetic periphery to the bending of configurations of magnets direction, with the configurations of magnets face at angle, make the magnetic line of force that comes out from the N utmost point enter the S utmost point by the configurations of magnets face from bend, there is not the magnetic line of force to leak into the outside from the side, further magnetic screen efficiently.

If dispose second plate-shaped member that is made of magnetic by the clamping vibrating mass on an opposite side of plate-shaped member, then the magnetic line of force can prevent that by in second plate-shaped member magnetic line of force from leaking into the outside.At this moment, preferably these plate-shaped members wear at least one hole that is used for by sound on one of at least.

Among the present invention, the electric current that flows through coil is stressed from magnetic field to make the vibrating mass vibration, but the position of the same coil groups of configuration vibrating mass can not get big sound equipment output during the one vibration, or audio distortions, produces noise.Therefore, the hardness of the vibrating mass of the configuration section of configuration coil is preferably higher.On the other hand, as vibrating mass integral body, since with must free vibration on the direction of vibrating mass face quadrature, therefore should make the hardness of the part beyond the configuration section of coil of configuration vibrating mass lower, the coil configuration part of vibrating mass with the direction of the face quadrature of vibrating mass on move easily.Therefore, among the present invention, the hardness height of the part beyond this configuration section of hardness ratio of configuration first coil of vibrating mass and the configuration section of second coil.Like this, support the hardness of the part of configuration section vibrating mass on every side to reduce, thereby can make the vibrating mass vibration effectively.

The high vibrating mass structure of hardness of coil configuration part partly applies coating to the coil configuration of vibrating mass, make its hardness height than the vibrating mass around the coil configuration part, with coil configuration in the coil configuration of vibrating mass part, the vibrating mass of configuration coil is fitted in than on other low vibrating mass of this vibrating mass hardness, makes the hardness height of the hardness ratio coil configuration part on every side partly of coil configuration part.

When the elastic part that surrounds the coil configuration part is set between the configuration section of the configuration coil of vibrating mass and the support sector of holding components divide, coil configuration part whole can with the vertical direction of vibrating mass face on parallel moving, therefore, make the vibrating mass vibration more efficiently.

Among the present invention, shown in Fig. 6 A and Fig. 6 B, when the polarity of adjacent magnet m disposes on the contrary, the magnetic line of force between the adjacent magnet from the N utmost point to 2 S utmost points, so the magnetic line of force in the zone between magnet and the magnet towards with the direction of vibrating mass face almost parallel.But, even the polarity of adjacent magnet is identical or opposite each other as shown in Figure 7, being arranged under the situation adjacent between the identical magnetic pole strength of segment polarity, the mid portion of these N utmost points is places of magnetic line of force direction counter-rotating.Therefore, the position of the sense of current of coil counter-rotating will accurately be designed, and this is impracticable.As shown in Figure 8, for example, when the leg-of-mutton magnet m of odd number is configured to ring-type, can be combined into the polarity unanimity of adjacent magnet, at this moment, the counter-rotating of magnetic line of force direction is therefore impracticable between 2 magnets of polarity unanimity.Thereby shown in Fig. 6 A and Fig. 6 B, the configuration between the adjacent magnet does not depart from best.

As above explanation, according to each invention, disposing first magnet and second magnet comes adjacent with predetermined surface, make the magnetic pole strength of opposed polarity towards equidirectional, thereby become maximum towards the magnetic line of force with the direction of vibrating mass face almost parallel, or first coil become magnetic line of force interlinkage with second coil configuration, make towards with the magnetic line of force and first coil and the second coil interlinkage of the direction of vibrating mass face almost parallel, when first coil and the second coil midstream overcurrent, the electric current direction stressed from magnetic field be roughly with the direction of vibrating mass face quadrature, power along the direction of vibrating mass face becomes very little, thereby realizes reducing the noise composition, improve the effect of tonequality.

Under the situation that the flexible air layer is arranged, disposing first magnet and second magnet comes adjacent with predetermined surface, make the magnetic pole strength of opposed polarity towards equidirectional, thereby the magnetic line of force towards with the direction of vibrating mass face almost parallel, perhaps first coil is become magnetic line of force interlinkage with second coil configuration, make towards with the magnetic line of force and first coil and the second coil interlinkage of the direction of vibrating mass face almost parallel, when first coil and the second coil midstream overcurrent, the electric current direction stressed from magnetic field be roughly with the direction of vibrating mass face quadrature, power along the direction of vibrating mass face becomes very little, form parts by the flexible air layer and make reflection identical, thereby realize reducing the noise composition to the phase place of the sound of vibrating mass direction, improve the effect of tonequality.

In above-mentioned each invention, a plurality of first magnets and a plurality of second magnet are near to or in contact with being configured to when rectangular, with the situation of bar-shaped magnet and row arrangement is compared configurable more magnet, also identical or its several times of coil number with the magnet number, therefore with the length summation lengthening of the part of the magnetic line of force interlinkage of coil, realize improving the ratio of the coil occupied area on the vibrating mass face, improve the sound equipment conversion efficiency, and further improve the effect of tonequality.

And, first magnet and second magnet one of at least be shaped as multiple shape, then can cooperate the shape of plane loud speaker to dispose first magnet and second magnet, thereby be suitable for the plane loud speaker of Any shape, obtain increasing the effect of the freedom of design in configuration of loud speaker integral body.

In above-mentioned each invention, just the situation of flat acoustic transducer as loud speaker is described, but can be used as oscillation actuator uses, be used for making the vibrating membrane vibration, in conductor and coil, produce induced current, but make general acoustic transducer or vibrating mass vibration beyond microphone, the flat acoustic transducer.

According to each invention, first magnet and second magnet separated predetermined distance or be fixed on the vibrating body contiguously or be clamped in make different magnetic pole strengths between vibrating body and the cramping body, thereby make thickness thinner towards identical direction.The magnetic line of force towards with the direction of vibrating mass face almost parallel, towards with the magnetic line of force and first coil and the second coil interlinkage of the direction of vibrating mass face almost parallel, when first coil and the second coil midstream overcurrent, stressed direction becomes and the vibrating mass face direction of quadrature roughly electric current from magnetic field, power along the direction of vibrating mass face is very little, the noise composition that is reduced, improves the effect of tonequality.

A plurality of first magnets are separated predetermined distance with a plurality of second magnets or contact and be configured to when rectangular, with the situation of bar-shaped magnet and row arrangement is compared configurable more magnet, also identical or its several times of coil number with the magnet number, therefore with the length summation lengthening of the part of the magnetic line of force interlinkage of coil, realize improving the ratio of the coil occupied area on the vibrating mass face, improve the sound equipment conversion efficiency, and further improve the effect of tonequality.

In the foregoing invention, when being installed in magnet on the vibrating body, the compliant member that inserts nonmagnetic material between vibrating body and the magnet is better.

[brief description of drawings]

Fig. 1 is the decomposition diagram of the existing plane loud speaker of expression;

Fig. 2 A and 2B are first coil of expression coil coiling direction of the present invention when identical and the key diagram of the connection status of second coil;

Fig. 3 A, 3B and 3C are the key diagrams of the connection status of expression asynchronous first coil of coil coiling direction of the present invention and second coil;

Fig. 4 is the plane graph that expression is configured to the configuration status of the magnet that the polarity of magnetic pole strength of adjacent permanent magnet differs from one another;

To be expression be configured to the plane graph of the configuration status of the magnet that the polarity of the magnetic pole strength of adjacent permanent magnet differs from one another by rule to Fig. 5;

Fig. 6 A and 6B are the plane graphs of the configuration status example of the expression magnet that do not produce situation about departing between the adjacent magnets of the present invention;

Fig. 7 is the plane graph of configuration status that produces the magnet of situation about departing between the expression adjacent magnets of the present invention;

Fig. 8 is the plane graph of expression with the configuration status of odd number magnet arrangements magnet circlewise;

Fig. 9 is the decomposition diagram of the expression first embodiment of the present invention;

Figure 10 is the part perspective view that is illustrated in the spiral coil that disposes on the outside at the position corresponding with the permanent magnet outer edge of vibrating membrane of above-mentioned first embodiment;

Figure 11 is the decomposition diagram of the expression second embodiment of the present invention;

Figure 12 is the plane graph of the coil connection status of above-mentioned second embodiment of expression;

Figure 13 is the key diagram that is illustrated in the connection status of the coil of placing on the two sides in the table of vibrating membrane of above-mentioned second embodiment;

Figure 14 is the profile along the plane of the permanent magnet m18～m38 that passes through above-mentioned second embodiment;

The coil that Figure 15 is expression by fixing other examples of vibrating membrane is to the profile on the plane of L11～L31;

Figure 16 is illustrated in profile that be provided with on the plate-shaped member that magnetic constitutes and the variation roughly the same perisporium of permanent magnet height;

Figure 17 is the decomposition diagram of the expression third embodiment of the present invention;

Figure 18 is the exploded view of the expression third embodiment of the present invention;

Figure 19 is the plane graph of the coil connection status of above-mentioned the 3rd embodiment of expression;

Figure 20 is the fragmentary cross-sectional view of the expression third embodiment of the present invention;

Figure 21 is the profile of the expression fourth embodiment of the present invention;

Figure 22 A is the plane graph that the configuration status of the permanent magnet that the magnetic line of force of Figure 23 distributes is measured in expression, and Figure 22 B is the profile of Figure 22 A;

Figure 23 A is the curve that the magnetic line of force when representing seamlessly to dispose permanent magnet distributes, the key diagram of the allocation position of Figure 23 B coil that to be expression distribute corresponding to the magnetic line of force of Figure 23 A;

Figure 24 A is the plane graph that the configuration status of the permanent magnet that the magnetic line of force of Figure 25 distributes is measured in expression, and Figure 24 B is the profile of Figure 25 A;

Figure 25 A is the curve that the magnetic line of force of expression when separating the gap and disposing permanent magnet distributes, the key diagram of the allocation position of Figure 25 B coil that to be expression distribute corresponding to the magnetic line of force of Figure 25 A;

Figure 26 is the decomposition diagram of the expression fifth embodiment of the present invention;

Figure 27 is the decomposition diagram of the expression sixth embodiment of the present invention;

Figure 28 is the profile of expression along the plane of the permanent magnet m18～m38 that passes through above-mentioned the 6th embodiment;

Figure 29 is the decomposition diagram of the expression seventh embodiment of the present invention;

Figure 30 is the fragmentary cross-sectional view of the expression seventh embodiment of the present invention;

Figure 31 is the fragmentary cross-sectional view of the variation of expression the 7th embodiment;

Figure 32 is the decomposition diagram of the expression eighth embodiment of the present invention;

Figure 33 is expression the 8th an embodiment profile;

Figure 34 is the sketch that the stressed direction of the electric current of coil of the 8th embodiment is flow through in expression;

Figure 35 is the decomposition diagram of the expression ninth embodiment of the present invention;

Figure 36 is the profile of expression along the plane of the permanent magnet m18～m38 that passes through above-mentioned the 9th embodiment;

Figure 37 is the profile that expression separates the variation of predetermined distance configuration permanent magnet;

Figure 38 is the profile of the variation of expression set of permanent magnets;

Figure 39 is the decomposition diagram of the plane loudspeaker unit of embodiments of the invention;

Figure 40 is the major profile figure of the tenth embodiment;

Figure 41 A～41C is the manufacture method of the edge member of the tenth embodiment;

Figure 42 is the perspective view of another example at expression edge;

Figure 43 is the perspective view of an example again at expression edge;

Figure 44 is the profile of other examples of expression vibrating membrane;

Figure 45 is the profile of the 11 embodiment;

Figure 46 is the plane graph of first substrate of the 11 embodiment;

Figure 47 is the plane graph of second substrate of the lead of configuration the 11 embodiment.

[most preferred embodiment of invention]

Describe the embodiment that the present invention is applicable to loud speaker in detail below with reference to accompanying drawing.

(first embodiment)

The plane loudspeaker unit of first embodiment has the formed yoke 20 of plate-shaped member of the rectangle of magnetic formation as shown in Figure 9.One of upper corner of yoke 20 is gone up by adhesive is bonding and is being disposed flat leg-of-mutton permanent magnet M11, the magnetic pole strength of its S utmost point up, hypotenuse is towards the bight direction.As permanent magnet, can use ferrite series magnet and neodymium series magnet.

Disposing the permanent magnet M12 of flat square shape on the long side direction of yoke 20 position adjacent with permanent magnet M11, the magnetic pole strength of its N utmost point is towards the top, and the side of 1 side and permanent magnet M11 joins.

The magnetic pole strength that is disposing the S utmost point on the long side direction of yoke 20 position adjacent with permanent magnet M12 is towards the flat of top and be the permanent magnet M13 of square shape, disposing the flat leg-of-mutton permanent magnet M14 of the magnetic pole strength of the N utmost point towards the top on the position adjacent with permanent magnet M13, each side and adjacent permanent magnet join.

Along the permanent magnet M11 of yoke 20, M12, M13,3 permanent magnets of configuration on the adjacent regions of the short side direction of each of M14, the magnetic pole strength that polarity is different is arranged alternately, and 1 side contacts with adjacent permanent magnet.Each permanent magnet M11～M34 is that flat and surperficial two sides is parallel, so each magnetic pole strength and yoke 20 is top parallel, disposes towards equidirectional.

The above results is that 12 permanent magnets that mix triangle and tetragonal shape are placed leg-of-mutton permanent magnet on 4 bights, and seamlessly be configured to differ from one another between the polarity of adjacent permanent magnet rectangular.Like this, seamlessly dispose between the polarity of adjacent permanent magnet with differing from one another, make between adjacent permanent magnet magnetic line of force maximum with the direction of vibration face almost parallel.

Magnetic pole strength towards the top is the permanent magnet Mij (i=1 wherein of first polarity, 3 o'clock, j=1,3, and j=2 during i=2,4) with one of first magnet of the present invention and second magnet quite the time, the magnetic pole strength towards the top is permanent magnet Mij (i=1 wherein, 3 o'clock of second polarity, j=2,4, and j=1 during i=2,3) another is suitable with first magnet of the present invention and second magnet.Therefore, the magnet of alternately arranging towards the top along the different magnetic pole strength of yoke one side polarity that a plurality of magnet constituted is listed as the multiple row that is arranged side by side, and makes to be arranged alternately along the different magnetic pole strength of the another side polarity of yoke.

Go up the septs 16 of the configuration thickness frame shape thicker above the yoke 20, make and place all permanent magnets in the peristome than permanent magnet thickness.

The magnetic pole strength of sept 16 and permanent magnet, thus with the top parallel of yoke and apply the tension force of regulation on face, the magnetic pole strength of face and permanent magnet is approaching and relatively the peripheral part of the face of vibrating membrane 26 is fixed on sept 16 top.Vibrating membrane 26 is made of polymeric membranes such as polyamide, polyethylene terephthalate.The middle body of vibrating membrane 26 is provided with the coil configuration part of 8 high dihedrals of hardness by coated ceramic, resist (for example epoxy system).Therefore, lower around the coil configuration of vibrating membrane 26 part than coil configuration part hardness, vibrating membrane 26 by the low part of hardness be fixed on sept 16 above.

Corresponding each permanent magnet M11～helically wound coil C11～C34 of M34 configure volumes on the one side of the coil configuration part of vibrating membrane 26.Each coil C11～C34 shape is similar to the magnetic pole strength outer rim of each permanent magnet M11～M34, and inwardly week is identical coiling direction from periphery corresponding to the coil of the magnetic pole strength of identical polar.

That is, the coil C11 corresponding with leg-of-mutton permanent magnet, C14, C31, C34 is wound into triangle, the coil C12 corresponding with dimetric permanent magnet, C13, C21～C24, C32, C33 is wound into quadrangle.

Such coil can be by copper steam-plating film on the coil configuration part of vibrating membrane 26, and it is that spirality constitutes voice coil loudspeaker voice coil that this copper film etching is become flat shape.Substitute the copper steam-plating film, but pressing or joint Copper Foil or stacked copper coating form coil.And cover each coil with insulating material.

Coil C12 as shown in figure 10, the periphery of spiral, i.e. the periphery C of coil ₀Be arranged in vibrating membrane 26 on the corresponding consistent zone, position of the outer rim with magnetic pole strength, and as shown in Figure 9, the peripheral part of spiral, promptly the peripheral part of coil is configured to the phase non-overlapping copies.Other coil is also the same with coil C12, the periphery of coil is placed in the zone consistent with the pairing position of outer rim of magnetic pole strength on the vibrating membrane, and the peripheral part of coil is configured to the phase non-overlapping copies.Like this, each coil C11～C34 is configured to place periphery on the outer rim at the position relative with the magnetic pole strength of vibrating membrane.The magnetic line of force size in zone of regulation that comprises the part corresponding with the magnetic pole strength center of vibrating membrane is very little, and when not disposing coil in this zone, the weight of vibrating membrane can reduce.

Afterwards, the outer circumferential side of the coil adjacent with the permanent magnet column direction and interior all sides couple together, the coil column of the coil column of formation order serial connecting coils C34～C31, the coil column of order serial connecting coils C21～C24 and order serial connecting coils C14～C11.These coil columns order again are connected in series.

Said fixing the yoke 20 of a plurality of permanent magnets and fixed configurations the sept of vibrating membrane 26 of a plurality of coils form the plane loudspeaker unit.

Like this, be configured to dispose coil on the vibrating membrane also parallel with it as mentioned above near the magnetic pole strength of permanent magnet, make that interlinkage is along the magnetic line of force of the direction of vibration face in the part of joining with each coil, on the other hand, the also magnetic line of force of interlinkage and the vertical direction of vibration face, but the power that this magnetic line of force produces is little, acts on rightabout and offset in the symmetric position of coil.Therefore, from an end of the coil groups that is connected in series in the plane loudspeaker unit when the other end flows through electric current, flow through the electric current of equidirectional between the joining part of adjacent coil, the electric current that flows through in the joining part of adjacent coil is subjected to from magnetic field and the power of vibrating the equidirectional of face quadrature.Its result, vibrating membrane is subjected to hardly along the power of vibration face direction, with the direction of face quadrature on vibrate, therefore make the noise composition minimum, can improve tonequality.In the foregoing description, the coil configuration part coated ceramic of vibrating membrane, thereby the vibration of the part one of coated ceramic, sound does not have distortion yet, exportable big sound.

In the present embodiment, a plurality of permanent magnets are configured in the vertical of existing bar-shaped magnet, be on the column direction of present embodiment, the a plurality of coils of configuration on the part corresponding of vibrating membrane with permanent magnet, therefore the length overall of the peripheral edge portion of a plurality of permanent magnets is longer than the outer rim length of bar-shaped magnet, with the whole length of the coiler part of magnetic line of force interlinkage than the bar-shaped magnet duration of use.Thus, with and the situation of a plurality of bar-shaped magnets of row arrangement compare, the ratio of the occupied area of the coil around each magnet improves, and effectively the magnetic line of force than original many, thereby the signal of telecommunication can improve tonequality to the efficient rising of voice signal conversion.

And, as permanent magnet and coil, the permanent magnet of mixed configuration triangle and dimetric shape and coil, therefore, the shape of loud speaker can form and original different shape.

(second embodiment)

Then second embodiment is described with reference to Figure 11.Second embodiment has with magnetic and constitutes and by the yoke 20 that the plate-shaped member of the rectangle that wears a plurality of hole 20A on the circumference constitutes, be formed for the magnet fixed part of fixed permanent magnet on the position that the hole 20A of yoke 20 surrounds.

Make on the magnet fixed part magnetic pole strength towards the top by engaging flat and each permanent magnet m11～m38 that form triangle of fixed configurations seamlessly, make the magnetic pole strength alternate configurations of opposed polarity, and the side contacts with adjacent permanent magnet.That is, permanent magnet Mij (i=1 wherein, 3 o'clock, j=1,3,5,7, and j=2 during i=2,4,6,8) the magnetic pole strength of the S utmost point fix configuration towards the top, permanent magnet Mij (i=1 wherein,, j=2 at 3 o'clock, the magnetic pole strength of the N utmost point 4,6,8, and j=1 during i=2,3,5,7) fixes configuration towards the top.It is extremely reciprocal that each permanent magnet also can be fixed into the S utmost point and N.

Vibrating membrane 26 and magnetic pole strength be near configuration on the upper face side of yoke 20, makes magnetic pole strength with permanent magnet, thus top parallel with yoke.Vibrating membrane 26 is the same with first embodiment, is made of polymeric membranes such as polyamide, polyethylene terephthalate, has disposed the high coil configuration part of hardness of the rectangle of coil middle body setting by coated ceramic.Thereby, all low around this coil configuration part than coil configuration part hardness.

Vibrating membrane 26 is fixed on the framework 24 by the low whole ambient parts of the hardness of vibrating membrane, thereby fixing with framework 24.The openings of sizes of framework 24 is bigger than the size that comprises whole permanent magnets fixing on the yoke.

The coil configuration of vibrating membrane 26 partly goes up corresponding each permanent magnet m11～m38 configure volumes coiled and is configured in 1 pair of coil on the two sides constitutes in the table of coil configuration part coil to L11～L38.It is similar to the outer rim of each permanent magnet m11～m38 that each coil is wound into shape to L11～L38, be placed on with as in the consistent zone, the corresponding position of the outer rim of the magnetic pole strength on the coil periphery of spiral periphery and the vibrating membrane, and be configured to not overlap each other as the coil peripheral part of the peripheral part of spiral.

Such coil is the same with first embodiment, and partly by crimping or joint copper film, it is that spirality constitutes that this copper film etching is become flat shape to the coil configuration of vibrating membrane 26.And cover each coil with insulating material.

Soft materials 22 such as clamping nonwoven fabrics between vibrating membrane 26 and a plurality of magnetic pole strength, sponge, mineral wool or foaming urethane contact with magnetic pole strength by the vibrating membrane vibrator coil preventing.

Dispose with magnetic the same with yoke 20 constitutes and a plurality of hole 20A worn into the magnetic shielding parts 28 that the plate-shaped member of rectangular rectangle constitutes on the upper face side of vibrating membrane 26.

As shown in figure 12, coil is to L11～L38 a plurality of (in the present embodiment being 4) coil a plurality of to constituting (in the present embodiment being 6) coil groups G1～G6 that is connected in series.This coil groups G1～G6 is connected in parallel.

Coiling direction and the connection status of coil groups G1～G6 are described with reference to Figure 13.The coiling direction and the connection status of each coil are identical, therefore below to the 1 pair of coil that is connected in series adjacent on the vibrating membrane long side direction to describing, the coiling direction that other coils are right and the explanation of connection status are omitted.The coil that on the surface of the right coil configuration part of coil, disposes (with first coil of the invention of using first～the 4th coil to suitable) be LA1, with the coil that on the inside of coil configuration section, disposes (with second coil of the invention of using first～the 4th coil to quite) be LB1, the coil that on the surface of the right coil configuration part of another coil, disposes (with the 4th coil of the invention of using first～the 4th coil to suitable) be LA2, with the coil that on the inside of coil configuration section, disposes (with the tertiary coil of the invention of using first～the 4th coil to quite) illustrate as LB2.The coiling direction of each coil is the direction of looking from the face side of whole vibrating membrane.

Coil LA1 is from the formation of reeling in the direction of the clock in inside week of periphery, coil LB1 is from the formation of reeling in the direction of the clock of interior circumferential periphery, coil LB2 inwardly forms by counterclockwise reeling from periphery in week, and coil LA2 forms by counterclockwise reeling from interior circumferential periphery.Therefore the coiling direction of the coil that disposes on a face of coil configuration section is an equidirectional from interior circumferential periphery (or inwardly all from periphery).

Interior all ends of coil LA1 are connected with interior all ends of coil LB1 from the surface to the coil configuration part that the inside vertically connects vibrating membrane 26.The peripheral end of coil LB1 extends and is connected in the peripheral end of coil LB2 along the inside of coil configuration part.Interior all ends of coil LB2 are connected with interior all ends of coil LA2 from the inside to the coil configuration part of Surface Vertical perforation vibrating membrane 26.And the peripheral end of coil LA2 partly extends and is connected with the peripheral end of unshowned adjacent coil along coil configuration.

Coiling direction and connection status by above-mentioned explanation repeatedly between the coil of each coil groups are connected in series.

When the peripheral end of the coil LA1 of the coil groups that is connected in series flows through electric current I, at direction of arrow upper reaches overcurrent I shown in Figure 13, flow through electric current in the same way part that strides across periphery interior week of therefore between coil LA1, LA2, joining and the part that strides across periphery interior week of between coil LB1, LB2, joining.

Adjacent coil groups, promptly the coiling direction of coil groups G1 and coil groups G2, coil groups G2 and coil groups G3, coil groups G4 and coil groups G5, coil groups G5 and coil groups G6 forms reciprocal each other.

The yoke 20 of a plurality of permanent magnets of said fixing, soft material 22, fixed configurations the framework 24 and the magnetic shielding part 28 of vibrating membrane 26 of a plurality of coils be combined into the plane loudspeaker unit, support the periphery framework 24 of vibrating membrane 26 of a plurality of coils that made between yoke 20 and magnetic shielding part 28 clamping soft material 22, fixed configurations with unshowned holding components.

Figure 14 has represented to omit the profile of soft material of the plane loudspeaker unit of above-mentioned assembling.Adjacent permanent magnet m18 and permanent magnet m28, adjacent permanent magnet m28 and permanent magnet m38 seamlessly are configured to the side and adjacent permanent magnet joins, and the magnetic pole strength of its upper side is an opposed polarity and towards equidirectional.Therefore, the magnetic line of force that produces from each permanent magnet is from the magnetic pole strength of the N utmost point magnetic pole strength towards the S utmost point, the magnetic line of force in the zone between the adjacent permanent magnet towards with the direction of vibration face almost parallel, especially be maximum above the contact site of permanent magnet.

The configuration coil is to L18 on the surface of vibrating membrane and the inside, L28, L38, thus on each coil interlinkage towards with the magnetic line of force of the direction of vibration face almost parallel.When flowing through the electric current I of direction shown in Figure 13 on the coil, as shown in figure 14, flow through the electric current of equidirectional between the part that strides across periphery interior week of joining of adjacent coil, whole winding is accepted the power F of equidirectional and the direction vertical with the face of vibrating membrane, thereby vibrating membrane moves to the direction vertical with face.Therefore, want the signal of telecommunication of the sound equipment that produces to lead to coil by making expression, vibrating membrane produces acoustic signal to should signal of telecommunication vibration.H represents the direction of the magnetic line of force in Figure 13 and 14.

At this moment, the magnetic line of force of the magnetic pole strength of the bottom surface side of permanent magnet comes out to enter into the S utmost point by the magnetic circuit in the yoke 20 from the N utmost point as shown in figure 14, therefore produces the magnetic line of force higher than the magnetic pole strength density of upper face side.Thus,, also can be transformed into acoustic signal expeditiously, reduce the magnetic leakage line of force that flows to the bottom surface side outside even flow through the electric current of little amplitude.

As shown in figure 14, the magnetic line of force that arrives the shield member of permanent magnet upper face side magnetic pole strength comes out to enter into the S utmost point by the magnetic circuit in the magnetic shielding part 28 from the N utmost point, therefore reduces to the outside magnetic leakage line of force, carries out magnetic screen.

Wear a plurality of holes on the magnetic shielding part 28, make acoustic signal pass through this hole and export from the plane loudspeaker unit.The hole output that acoustic signal also can form from yoke 20.

In describing above, illustrate with the example that is fixed on the framework 24 around the vibrating membrane 26, but as shown in figure 15, by under with the state around the cloth vibrating membrane 26 that has flooded foaming urethane, synthetic resin, it being held to come in also available framework 25 clamping vibrating membranes 26 in disposed the groove of framework 25 of groove that section is the コ word shape.

Can be provided with as shown in figure 16 on the yoke 20 of the various embodiments described above form with magnetic and upwards surround permanent magnet with periphery from bottom surface 20b with permanent magnet perisporium 20c in the roughly same height.The permanent magnet m38 that is provided with on the bight shown in Figure 11 has not 2 sides that contact with adjacent permanent magnet, but the perisporium 20c that constitutes with magnetic is set, the feasible magnetic line of force and the coil interlinkage that produces to perisporium 20c from the N utmost point of permanent magnet m38 around such permanent magnet.The magnetic line of force that comes out from the N utmost point enters the S utmost point from perisporium 20c by bottom surface 20b, thereby does not arrive the outside magnetic leakage line of force, more effectively magnetic screen from the side.

The coils from parallel connection of coils of the various embodiments described above or serial or parallel connection series hybrid are set to setting with the current resistor value.Like this can free connecting coil, make the grouping that realizes each voice coil loudspeaker voice coil, but one is vibrated each coil groups.

(the 3rd embodiment)

Then the 3rd embodiment is described with reference to Figure 17 and Figure 18.The 3rd embodiment such as Figure 17 and shown in Figure 180 have with magnetic and constitute and by the yoke 20 that the plate-shaped member of the rectangle that wears a plurality of hole 20A on the circumference constitutes, be formed for the magnet fixed part of fixed permanent magnet on the position that the hole 20A of yoke 20 surrounds.Wear the propeller boss insertion aperture 20B that is inserted in the propeller boss that forms on the shell on four angles of yoke 20.

Make on each magnet fixed part magnetic pole strength towards the top by engage waiting each of the flat and a plurality of permanent magnet m that form square shape of fixed configurations seamlessly, make the magnetic pole strength alternate configurations of opposed polarity, and side and adjacent permanent magnet join.Promptly, will be along the length direction alternate configurations N utmost point magnetic pole strength of yoke 20 towards the magnet row fixed configurations multiple row that the permanent magnet of top and S utmost point magnetic pole strength constitute towards the permanent magnet of top, make N utmost point magnetic pole strength on the Width of yoke 20 towards above permanent magnet and S utmost point magnetic pole strength towards above permanent magnet alternately place.Each permanent magnet can be fixed into the S utmost point and N is extremely reciprocal.

The upper face side of yoke 20 configuration vibrating membrane 26 makes magnetic pole strength with permanent magnet, thus top parallel with yoke.Vibrating membrane 26 has the coil configuration portion 12 of configuration coil, the terminal arrangement part 14 of configuration terminal and the connecting portion 18A of connecting coil configuration portion 12 and

terminal arrangement part

14,18B, 18C, integral body is made of polymeric membranes such as polyamide, polyethylene terephthalate.

Corresponding each permanent magnet m configuration is a plurality of in the coil configuration portion 12 of vibrating membrane 26 is wound into helical form and is configured in 1 pair of coil on the two sides constitutes in the table of coil configuration portion coil to L.Each coil is wound into helical form as shown in figure 10 to L, shape is similar to the outer rim of each permanent magnet m, be placed on with as in the consistent zone, the corresponding position of the outer rim of the magnetic pole strength on the coil periphery of spiral periphery and the vibrating membrane, and be configured to as shown in figure 17 not overlap each other as the coil peripheral part of the peripheral part of spiral.

As shown in figure 19, each coil constitutes a plurality of (in the present embodiment being 9) coil groups G1～G9 to L a plurality of (in the present embodiment the being 4) coil that is connected in series to L.The same being connected in parallel of coil groups of this coil groups G1～G9 and Figure 12.The coiling direction of coil groups G1～G9 is identical with the coiling direction and the connection status of each coil of Figure 13 explanation with connection status, and explanation is omitted.Adjacent coil groups, promptly the coiling direction of coil groups G1 and coil groups G2, coil groups G2 and coil groups G3, coil groups G4 and coil groups G5, coil groups G5 and coil groups G6, coil groups G7 and coil groups G8, coil groups G8 and coil groups G9 forms reciprocal each other.

The right coil of such coil is bonded on plated copper film in the coil configuration portion 12 of vibrating membrane 26, and by etching this plated copper film being formed flat shape is helical form.And the resist that each coil is used as insulating material covers.

Devices spaced apart fixed configurations plus end 16A on the terminal arrangement part 14 of vibrating membrane 26, negative terminal 16B.Plus end 16A is through being arranged on the end that 2 wirings on connecting portion 18B and the 18C are connected in the coil groups that is connected in parallel, and negative terminal 16B is through being arranged on the other end that 2 wirings on connecting portion 18B and the 18A are connected in the coil groups that is connected in parallel.Like this, 2 wirings of respectively hanging oneself of plus end and negative terminal are connected in coil groups, thereby during the wiring cut-off on connecting portion 18A or the connecting portion 18C, also can provide electric current through the cloth alignment coil groups on the connecting portion 18B, make the reliable in action that improves the plane loud speaker.

The shell 30 of the resin making of holding coil groups and vibrating membrane 26 is set as shown in figure 18.Shell 30 by wearing a plurality of through hole 30A bottom surface 30B and to be formed on the section that inside has spatial accommodation from the perisporium 30C that the periphery of bottom surface 30B makes progress be the shape of コ word shape, on each angle of perisporium 30C, form propeller boss 30D.

The flexible holding components 10A that the coil configuration portion 12 of vibrating membrane 26 and coil groups are made of the nonwoven fabrics of ウレ Application manufacturing together, 10B is from the side clamping of table the inside.Like this, coil configuration portion 12 and coil groups be by holding components 10A, and 10B surrounds and is contained in the spatial accommodation in the shell 30.And the yoke 20 that is configured to fixed permanent magnet is closed spatial accommodation from the perisporium 30C side seal of shell 30.Insert the aperture 20B of yoke 20 and welding propeller boss 30D from the outstanding part of aperture 20B by propeller boss 30D, be assembled into plane loud speaker shown in Figure 20.At this moment, the terminal arrangement part 14 of vibrating membrane is assembled into yoke 20 in the shell 30 and is being crimped on holding components 10A, is held under the state between the 10B, exposes from shell 30 simultaneously, being connected with signal source.

Thus, as shown in figure 20, the coil configuration portion 12 of vibrating membrane 26 can vibrate with coil groups, and the coil configuration portion 12 of vibrating membrane 26 and coil groups are not supported in the enclosure the spatial accommodation contiguously with the inner face of shell.

The profile of the holding components of the plane loudspeaker unit that omission is assembled as mentioned above is the same with Figure 14, adjacent permanent magnet m seamlessly is configured to 1 side and adjacent permanent magnet joins, and the magnetic pole strength of its upper side is an opposed polarity and towards equidirectional.Therefore, the magnetic line of force that produces from each permanent magnet is from the magnetic pole strength of the N utmost point magnetic pole strength towards the S utmost point, and the magnetic line of force in the zone between the adjacent permanent magnet be a maximum towards the direction, the particularly zone between permanent magnet with vibration face almost parallel.

The coil that configuration is made of the coil that disposes on surface and the inside in the coil configuration portion of vibrating membrane is to L, thus on each coil interlinkage towards with the magnetic line of force that vibrates face almost parallel direction.When the electric current I of direction is as shown in figure 13 passed through coil, as shown in figure 14, between the part that strides across periphery interior week of joining of adjacent coil, flowing through electric current in the same way, whole winding is subjected to the power F of identical and vertical with the face of the vibrating membrane direction of direction, so vibrating membrane moves to the direction vertical with face.

Therefore, want the signal of telecommunication of the sound equipment that produces to lead to coil by making expression, the coil configuration portion of vibrating membrane produces acoustic signal to vibrating with coil by the signal of telecommunication.The periphery of the coil configuration portion of vibrating membrane becomes free end at this moment, thus the whole vibration of coil configuration portion, the vibration efficiency of raising vibrating membrane.

At this moment, the magnetic line of force of the magnetic pole strength of the bottom surface side of permanent magnet comes out to enter into the S utmost point by the magnetic circuit in the yoke 20 from the N utmost point as shown in figure 14, therefore produce the magnetic line of force higher than the magnetic pole strength density of upper face side, thus, even flow through the electric current of little amplitude, also can be transformed into acoustic signal expeditiously, reduce the magnetic leakage line of force that flows to the bottom surface side outside.

Wear a plurality of hole 30A on the bottom surface 30B of shell 30, make that acoustic signal can be by this hole from the output of plane loud speaker surface.

(the 4th embodiment)

Then the 4th embodiment is described with reference to Figure 21.The same set of permanent magnets that a plurality of permanent magnet m are constituted with the 3rd embodiment of present embodiment is configured on the support of making as the cloth of flexible part 40, permanent magnet m group all with fixing with cloth 42 coverings, assign to set of permanent magnets M is fixed on the support 40 of cloth making with the fixing both sides of organizing with the permanent magnet m of cloth 42 by the support 40 that stitching cloth is made.

Permanent magnet m group top disposes the vibrating membrane 26 that has the coil groups the same with the 3rd embodiment by holding components 10A under the state that 10B surrounds.The cover of being made by cloth by the vibrating membrane of holding components encirclement 44 covers, the support 40 that cover 44 that cloth is made and cloth are made is stitched together, the coil configuration portion of vibrating membrane can vibrate with coil, and the coil configuration portion of vibrating membrane and coil are besieged together and support in the enclosure, make the inner face of the shell that coil configuration portion and the coil of vibrating membrane are not made with cloth contact.

Also equally in the present embodiment generate acoustic signal, but the part beyond vibrating membrane, coil and the permanent magnet makes of cloth, be rich in flexibility, can be contained in the clothes or be contained in the shoulder pad with the 3rd embodiment.Plane loud speaker or plane loudspeaker unit are configured in the pocket of clothes, the back side of part, clothes front or the clothes relative with bone such as clavicle of clothes etc. located, and can wear use.In addition, by can wearing use, vibration during by the vibration vibrating membrane and interaction from the magnetic force of permanent magnet make blood circulation good.

In the various embodiments described above, to be that example is described, but can use the coil that only on the vibrating membrane one side, disposes with configuration coil on vibrating membrane.And, in describing above, be that example is described spiral coil is fixed on the vibrating membrane, but alternative coil and use vibrating membrane with permanent magnet between 1 or multiple conducting wires fixing on the corresponding part.

In the various embodiments described above, be configured to example and be described to contact with each permanent magnet, come near each permanent magnet of configuration but can separate a gap a little, when using flat square magnet, the gap is preferably in below 1/3rd of permanent magnet width.The permanent magnet of contact configuration also can with the permanent magnet mixed configuration of approaching configuration.

In the various embodiments described above,, but, then can be used as microphone if in coil, flow through induced current according to faraday right-hand rule vibration vibrating membrane just to coil electricity and the loud speaker of output sound is described.

In fact, the flat square permanent magnet that contacts 9 long 10mm * wide 10mm * thick 3mm seamlessly is configured to it rectangular shown in Figure 22 A on yoke 20, is determined at the density of line of magnetic force on the line 1 that the distance of leaving the magnetic pole strength shown in Figure 22 B is 1.0mm.Magnetic pole strength top configuration magnetic shielding part.The density of line of magnetic force of direction (x direction) that the magnetic pole strength of ordering to B with A point on the line 1 is parallel and the direction (z direction) vertical with magnetic pole strength as shown in figure 23.

The density of line of magnetic force of x direction is zero on the position corresponding with the magnetic pole strength center, leaves more from this point, and its absolute value increases, and is maximum (more than the 5000G) on the border of adjacent permanent magnet.Especially, during contact configuration permanent magnet, compare when some gaps are approaching to dispose permanent magnet with described later separating, the density of line of magnetic force of the x direction of boundary significantly increases.The density of line of magnetic force of z direction with the magnetic pole strength central point of permanent magnet near be roughly 4000G and maximum on the relative position, but be zero at the boundary of A point and adjacent permanent magnet.

The allocation position of coil considers that such magnetic line of force distribution decides.Magnetic line of force branch as shown in figure 23 plants, configuration is during coil, disposes coil acting on the hatched example areas that drives the magnetic field more than the regulation density of line of magnetic force (for example 2000G) that vibrating membrane needs (for example with regional corresponding zone of the thoughtful inner 2.5mm outside permanent magnet) on the coil.In the zone of density of line of magnetic force less than the regulation density of line of magnetic force, on vibrating membrane, apply the power of vertical direction, but when considering the weight of coil, make the vibrating membrane vibration of hold-in winding not need very big power, area configurations coil by more than the regulation density of line of magnetic force can make the vibrating membrane high-efficiency vibration.

The density of line of magnetic force of z direction is non-vanishing in the hatched example areas of configuration coil, but power is on the rightabout in the symmetric position of coil and acts on, and the power of the direction parallel with vibrating membrane is cancelled each other, and does not therefore cause the distortion of vibrating membrane etc.

Then, the interval that separates 2.5mm shown in Figure 24 A is rectangular near being configured to the permanent magnet of 9 long 7.5mm * wide 7.5mm * thick 3mm on yoke, is determined at the density of line of magnetic force on the line 1 that the distance of leaving the magnetic pole strength shown in Figure 24 B is 1.0mm.Magnetic pole strength top configuration magnetic shielding part.The density of line of magnetic force of direction (x direction) that the magnetic pole strength of ordering to B with A point on the line 1 is parallel and the direction (z direction) vertical with magnetic pole strength as shown in figure 25.

The magnetic line of force of x direction, z direction distributes and permanent magnet that seamlessly will long 10mm * wide 10mm * thick 3mm is configured to when rectangular roughly the same, but leaving distance that A orders is that the position of 8.75mm begins to the zone of leaving between the position that distance that A orders is 11.25mm, promptly do not dispose in the top, gap of permanent magnet, the density of line of magnetic force of x direction maintains the value about the most about 4000G.

Same when disposing permanent magnet with no gap, acting on the hatched example areas that drives the magnetic field more than the regulation density of line of magnetic force that vibrating membrane needs (with from leave the magnetic pole strength periphery to the inside the position of predetermined distance to the regional corresponding zone of magnet with the center position of magnet) dispose coil, can make the vibrating membrane high-efficiency vibration.

(the 5th embodiment)

The following describes the 5th embodiment.The plane loudspeaker unit of the 5th embodiment as shown in figure 26, the thin layer spare 22A that the applying nonmagnetic substance constitutes on whole of the magnetic pole strength of a plurality of permanent magnets of the loudspeaker unit of first embodiment shown in Figure 9 covers whole of magnetic pole strength by thin layer spare 22A.Thin layer spare 22A is made of the flexibility with asbestos, mineral wool, nonwoven fabrics, Japan paper etc. and the material of aeration to a certain degree.Other parts are the same with first embodiment, and to the additional same numeral of same section, its explanation is omitted.

The sept 16 of the frame shape that the top configuration thickness of yoke 20 is thicker than permanent magnet is to place all permanent magnets in opening.This sept can be made of magnetic or nonmagnetic material, but can prevent that by constituting with magnetic the horizontal magnetic line of force from leaking.

The magnetic pole strength of the top and permanent magnet of sept 16, thus with the top parallel of yoke and on face, apply the tension force of regulation, face and thin layer spare 22A near and relatively the peripheral part of the face of vibrating membrane 26 is fixed on sept 16 top.

Thus between thin layer spare 22A and the vibrating membrane 26 by being inserted in the air layer that sept 16 between thin layer spare 22A and the vibrating membrane 26 forms specific thickness.This air layer thickness is the thickness that vibrating membrane 26 just contacts with thin layer spare 22A when vibrating membrane 26 vibrates with peak swing.

Like this, dispose coil as mentioned above on the vibrating membrane near thin layer spare and configuration abreast, thereby interlinkage is along the magnetic line of force of the direction of vibration face in the joining part of each coil, on the other hand, with the magnetic line of force that vibrates the face vertical direction also interlinkage, but the power that this magnetic line of force produces is little, acts on rightabout and offset in the symmetric position of coil.Therefore, from an end of the coil groups that is connected in series in the plane loudspeaker unit when the other end flows through electric current, flow through the electric current of equidirectional between the joining part of adjacent coil, the electric current that flows through in the joining part of adjacent coil is subjected to from magnetic field and the power of vibrating the equidirectional of face quadrature.Its result, vibrating membrane is subjected to hardly along the power of vibration face direction, with the direction of face quadrature on vibrate, therefore make the noise composition minimum, can improve tonequality.In the foregoing description, the coil configuration part coated ceramic of vibrating membrane, thereby the vibration of the part one of coated ceramic, sound does not have distortion yet, exportable big sound.

And, as permanent magnet and coil, mixed configuration triangle and dimetric variform permanent magnet and coil, therefore, the shape of loud speaker can form and original different shape.

Cover the high magnetic pole strength of hardness with flexible thin layer spare,, prevent that reflect sound from becoming noise so reduce from the sound of thin layer spare reflection.And, between vibrating membrane and thin layer spare, insert the air layer of specific thickness, so make from reflect sound phase place identically, prevent that vibrating membrane from distorting from thin layer spare.

(the 6th embodiment)

Then the 6th embodiment is described with reference to Figure 27 and Figure 28.The 6th embodiment substitutes the soft material 22 of second embodiment and uses thin layer spare 22A.Other parts are identical with second embodiment, and to adding identical label with a part, explanation is omitted.

That is, in the 6th embodiment, as the 5th embodiment explanation like that, for and vibrating membrane 26 between form the air layer of specific thickness, cover the magnetic pole strength of a plurality of permanent magnets with the thin layer spare 22A of applying.

The yoke 20 of a plurality of permanent magnets that fixing above-mentioned magnetic pole strength is covered by thin layer spare 22A, fixed configurations the framework 24 and the magnetic shielding part 28 of vibrating membrane 26 of a plurality of coils be assembled into the plane loudspeaker unit, between yoke 20 and magnetic shielding part 28, grip the framework 24 of the vibrating membrane 26 that has disposed a plurality of coils, and insert sept for the air layer that between vibrating membrane and thin layer spare, forms specific thickness.

In the present embodiment, the magnetic pole strength that hardness is high covers with flexible thin layer spare, therefore reduces the reflect sound from thin layer spare, reduces the situation that reflect sound becomes noise.And between vibrating membrane and thin layer spare, insert the air layer of specific thickness, thereby make from the phase place of the reflect sound of thin layer spare identically, prevent the vibrating membrane distortion.

Among above-mentioned the 5th, the 6th embodiment, the example that disposes each permanent magnet with regard to contact is described, and also can near each permanent magnet of configuration but separate the gap a little.Shown in the following examples, separate predetermined distance configuration magnet and also can.When using flat square magnet, the distance between magnet is preferably in below 1/3rd of width of permanent magnet.The permanent magnet of contact configuration with near or to separate the permanent magnet mixed configuration of predetermined distance configuration also passable.

(the 7th embodiment)

Then the 7th embodiment is described with reference to Figure 29～Figure 31.The 7th embodiment separates the magnet of the 6th embodiment the predetermined distance configuration as shown in figure 30, and the periphery of crooked yoke 20 is with configurations of magnets face 20B quadrature after forming orthogonal part 20C, also with configurations of magnets face bending abreast formation vibrating membrane installation portion 20D.Among Figure 30, vibrating membrane installation portion 20D is crooked to the inside, but as shown in figure 31, vibrating membrane installation portion 20D can be crooked laterally.Like this, by crooked laterally, this vibrating membrane installation portion 20D can be used as the installation portion of plane loudspeaker unit.

Vibrating membrane installation portion 20D goes up the sept 21 that inserts formations such as paper, fixes the outer peripheral edges of rectangular box-like framework 24.Framework 24 is to connect along outer peripheral edges that to protrude section be the edge that the elastic part 25 of semicircular arc forms.Be bonded on the outer peripheral edges of the vibrating membrane of middle body configuration coil on the inner peripheral side of framework 24.Thus, the entire circumference of the coil configuration of this vibrating membrane part is surrounded by the low elastic part 25 of the hardness of hardness ratio coil configuration part.This elastic part 25 as described below, the modulus of elasticity height around the modular ratio of a long leg part of dividing preferably.

The thin layer spare 22A of the above-mentioned explanation that the applying nonmagnetic material constitutes on whole of the magnetic pole strength of a plurality of permanent magnets, whole of magnetic pole strength are covered by thin layer spare 22A.Thus, the space between the magnet is covered by thin layer spare 22A, forms the air layer of specific thickness between vibrating membrane and the thin layer spare.

According to present embodiment, owing to form orthogonal part 20C, prevent that the magnetic line of force to the outside leaks from the side, simultaneously because thin layer spare 22A is set, make from the phase place of the reflect sound of thin layer spare identical, prevent vibrating membrane distortion, surround vibrating membrane with the rubber-like elastic part, thus obtain making vibrating membrane with and the effect vibrated abreast of the direction of the face quadrature of vibrating membrane.

As above explanation, according to present embodiment, because configuration flexible air layer formation parts on first magnetic pole strength of vibrating membrane and the second magnetic pole strength side, feasible and vibrating membrane forms the air layer of specific thickness together, therefore vibrating membrane and air layer form the air layer that forms specific thickness between the parts, do not produce phase difference in the reflect sound, thereby vibrating membrane does not produce distortion, obtain the effect of acoustical sound.

(the 8th embodiment)

The 8th embodiment then is described.The plane loudspeaker unit of the 8th embodiment shown in figure 32, the thin layer spare 112 of insertion nonmagnetic material comes the set of permanent magnets 114 with the flat permanent magnet M11 of a pair of vibrating body 120 clampings and the configuration of contacts side surfaces ground～M34 formation, as shown in figure 33, constitute and all flatly engage (for example about 1mm).

Shown in figure 32, on the position corresponding with one of bight of the vibrating body 120 of downside, same with Fig. 9, make the magnetic pole of the S utmost point supine flat and for the permanent magnet M11 of triangle with hypotenuse towards the bight direction, insert thin layer spare 112, be mounted to and move relative to thin layer spare 112.As permanent magnet, can use ferrite series magnet and NdFeB series magnet.

On the long side direction of vibrating body 120 position adjacent with permanent magnet M11, flat and magnetic pole strength that make the N utmost point for the permanent magnet M12 of square shape is mounted to and can moves relative to thin layer spare 112 towards the top and the insertion thin layer spare 112 that the side of a side and permanent magnet M11 is joined.

On the long side direction of vibrating body 120 position adjacent with permanent magnet M12, make the magnetic pole strength of the S utmost point install flat up and be the permanent magnet M13 of square shape, on the position adjacent with permanent magnet M13, the magnetic pole strength that makes the N utmost point joins towards the flat of top and for the permanent magnet M14 of triangle is mounted to each side and adjacent permanent magnet.

At permanent magnet M11, M12, M13, M14 installs 3 permanent magnets on the adjacent regions of the short side direction of each thin layer spare, the different magnetic pole strength of polarity is alternately placed, and the side contacts with adjacent permanent magnet.Each permanent magnet M11～M34 be flat and table in the two sides parallel, so each magnetic pole strength towards with the configuration of equidirectional parallel above the vibrating body.

Pei Zhi result is that permanent magnet Mij is the same with first embodiment as mentioned above, the magnet of alternately arranging towards the top along the different magnetic pole strength of vibrating body one side polarity that a plurality of magnet constituted is listed as the multiple row that is arranged side by side, and makes to be arranged alternately along the different magnetic pole strength of the another side polarity of vibrating body.

Each vibrating body 120 structures are identical, at the middle body of the vibrating membrane 26 that is made of polymeric membranes such as polyamide, polyethylene terephthalate and the permanent magnet M11～M34 helically wound coil C11～C34 of configure volumes accordingly.Each coil C11～C34 shape is roughly similar to the outer rim of each magnetic pole strength of permanent magnet M11～M34, and inwardly week is identical coiling direction from periphery with the corresponding coil of the magnetic pole strength of identical polar.

Such coil as above illustrate like that with the crimping of copper film or be incorporated into vibrating membrane 26, and this copper film of etching makes it flat shape and becomes helical form, constitutes voice coil loudspeaker voice coil like this.Substitute the copper steam-plating film, but pressing or joint Copper Foil or stacked copper coating form coil.And cover each coil with insulating material.

Thin layer spare 112 can constitute with the material of flexibility with asbestos, mineral wool, nonwoven fabrics, Japan paper etc. and aeration to a certain degree.Can this thin layer be set and permanent magnet is directly installed on the vibrating body.

The configuration of coil and connection are the same with first embodiment, and explanation is omitted.

The a pair of vibrating body 120 that the set of permanent magnets that a plurality of permanent magnet constituted 114, a pair of thin layer spare 112 and a plurality of coil of above-mentioned configuration and vibrating membrane constitute with being in contact with one another is assembled into the plane loudspeaker unit as shown in figure 33, in central clamping set of permanent magnets, thin layer spare is fitted mutually with the periphery of vibrating membrane.It is reciprocal in each vibrating body that the coil of the coil of the vibrating body of upside and the vibrating body of downside connects into the sense of current of crossing at the coil midstream corresponding with each magnet.

So, on vibrating membrane, dispose coil, therefore in the part of joining of each coil along the magnetic line of force interlinkage of the direction of vibration face, on the other hand, the magnetic line of force of the direction vertical with the face of vibrating membrane is interlinkage also, but the power that this magnetic line of force produces is little, acts on rightabout and offset in the symmetric position of coil.Therefore, from an end of the coil groups that is connected in series in the plane loudspeaker unit when the other end flows through electric current, as shown in figure 34, flow through the electric current of equidirectional in each vibrating body between the adjacent coil joining part, the electric current that flows through in the joining part of adjacent coil is subjected to and the power of vibrating the equidirectional of face quadrature from magnetic field H.Its result, vibrating membrane is subjected to hardly along the power of vibration face direction, a pair of vibrating body, a pair of thin layer spare and set of permanent magnets integratedly with the direction of face quadrature on vibrate, therefore make the noise composition minimum, can improve tonequality.

(the 9th embodiment)

Then the 9th embodiment is described with reference to Figure 35.Among the 9th embodiment, make magnetic pole strength towards top ground by engaging each that seamlessly insert thin layer spare 112 and fix the flat and permanent magnet m11～m38 that form square shape of configuration, so that the magnetic pole strength of different polarity is alternately placed and the side is contacted with adjacent permanent magnet.Be permanent magnet mij (i=1 wherein, 3 o'clock, j=1,3,5,7, and j=2 during i=2,4,6,8) make the magnetic pole strength of its N utmost point insert thin layer spare 112 towards the top, in vibrating body 120, be configured on the position corresponding, permanent magnet mij (i=1 wherein with each coil of vibrating

body

120,3 o'clock, j=2,4,6,8, and j=1 during i=2, the magnetic pole strength of the S

utmost point

3,5,7) inserts thin layer spare 112 and disposes towards the top, in vibrating body 120.Each permanent magnet also can be configured to the S utmost point and N is extremely reciprocal.

The vibrating membrane 26 that constitutes vibrating body 120 is the same with the 8th embodiment, is made of polymeric membranes such as polyamide, polyethylene terephthalate, forms the coil configuration part of configuration coil at middle body.

In the coil configuration of vibrating membrane 26 part with when permanent magnet m11～m38 is corresponding, configuration form helical form and the coil that a pair of coil constituted that on two sides in the table of coil configuration section, disposes to L11～L38.Each coil is wound into and each outer rim of permanent magnet m11～m38 similar shapes roughly L11～L38, be placed on with as in the consistent zone, the corresponding position of the outer rim of the magnetic pole strength on the coil periphery of spiral periphery and the vibrating membrane, and be configured to not overlap each other as the coil peripheral part of the peripheral part of spiral.Size at the magnetic line of force in the regulation zone of the part corresponding with the magnetic pole strength center that comprises vibrating body is very little, when not disposing coil in therefore should the zone, can alleviate vibrating body.

Coil is identical to the connection status of L11～L38 and coil groups G1～G6 and Figure 12 and Figure 13 explanation.

The thin layer spare 112 that inserts above-mentioned thin layer spare and insert upside on a plurality of permanent magnets of configuration on the vibrating body 120 of downside is installed the vibrating body 120 of upside.At this moment, the coil groups of the vibrating body of upside as shown in figure 36, with the coil groups of the vibrating body of downside similarly each of corresponding permanent magnet install.And the periphery that is assembled into thin layer spare and vibrating membrane is fitted mutually, the plane loudspeaker unit of a plurality of permanent magnets of clamping between vibrating body.

The situation of permanent magnet is installed on vibrating membrane is described with regard to inserting thin layer spare in the above-mentioned explanation, but can permanent magnet be installed and the thin layer spare and the periphery of vibrating membrane are installed mutually, like this, but a plurality of permanent magnets of clamping between the vibrating body.

Figure 36 is the profile that amplifies the coil diameter of the plane loudspeaker unit of representing above-mentioned assembling.Adjacent permanent magnet 18m and permanent magnet m28, adjacent permanent magnet 28m and permanent magnet m38 seamlessly are configured to the side and adjacent permanent magnet joins, and the magnetic pole strength of these upper sides is an opposed polarity, and towards equidirectional.The magnetic pole strength of lower side is the same with the magnetic pole strength of upper side.Therefore, the magnetic line of force that produces from each permanent magnet is from the magnetic pole strength of the N utmost point magnetic pole strength towards the S utmost point, the magnetic line of force in the zone between the adjacent permanent magnet towards with the direction of vibration face almost parallel, especially become maximum in the contact site above and below of permanent magnet.

The configuration coil is to L18 on the surface of up-down vibration film 26 and the inside, L28, L38, thus on each coil interlinkage towards with the magnetic line of force of the direction of vibration face almost parallel.During electric current I by direction shown in Figure 13 on the coil, as shown in figure 36, between all parts that strides across periphery of joining of adjacent coil, flow through electric current in the same way in the identical vibrating body, all coils equidirectional and be subjected to the power F of the direction vertical with the face of vibrating membrane, thus the up-down vibration film moves to the direction vertical with face with thin layer spare and permanent magnet simultaneously.Therefore, want the signal of telecommunication of the sound equipment that produces to lead to coil by making expression, vibrating membrane, thin layer spare and a plurality of permanent magnet to should signal of telecommunication vibration, produce acoustic signal together.

The plane loudspeaker unit of above-mentioned the 8th, the 9th embodiment can be exported bigger sound equipment by the vibratile parts that are fitted in nonmagnetic materials formations such as casing, plate.But the vibrating mass that nonmagnetic material such as casing, plate material constitutes can be made of wood, corrugated board, foaming urethane, plastics, glass, aluminium, hard board, porous plate, FPP etc.In addition, on the two sides of permanent magnet, dispose coil, therefore can be from the two sides output sound equipment of plane loudspeaker unit.By raising sympathetic response effect, but better be that vibrating mass is bigger than plane loudspeaker unit.

Among above-mentioned the 8th, the 9th embodiment, be that example is described, but can omit a vibrating body or omit a vibrating body and a thin layer spare, an also alternative vibrating body and thin layer spare and use the cramping body of iron plate etc. with a plurality of permanent magnets of clamping on the vibrating body.Vibrating on same direction with a pair of vibrating body is that example is described, but the sense of current that flows through in the coil of a vibrating body can be in contrast with the previous embodiment, vibrates in the other direction at a pair of vibrating body.

The coil of above-mentioned the 8th, the 9th embodiment can or mix serial or parallel connection by serial or parallel connection and connect impedance setting with loud speaker to setting.So,, realize the grouping of each voice coil loudspeaker voice coil, make and respectively organize the one vibration by free connecting coil.

Among above-mentioned the 8th, the 9th embodiment, be that example is described with each permanent magnet of contact configuration, but it is also passable near each permanent magnet of configuration to separate the gap a little.As shown in figure 37, separating predetermined distance configuration magnet also can.When using flat square magnet, the distance between magnet is below 1/3rd of permanent magnet width.The permanent magnet of contact configuration with near or the permanent magnet mixed configuration that separates the predetermined distance configuration also can.

Among above-mentioned the 8th, the 9th embodiment,, but, then can be used as microphone if in coil, flow through induced current according to faraday right-hand rule vibration vibrating membrane just to coil electricity and the loud speaker of output sound is described.

The independently example of a plurality of permanent magnets of configuration has been described in above-mentioned, but as shown in figure 38, mictomagnetism powder 130 forms plate-shaped member 132 in plastics and rubber, alternating magnetization becomes the S utmost point and the N utmost point and the part magnetization in the magnetic powder in regulation zone, constitute contact, near or separate a plurality of permanent magnets that predetermined distance disposes.The plate-shaped member that magnetic by iron etc. constitutes partly magnetizes, and constitutes the S utmost point, the N utmost point is arranged in rectangular substrate.Under these situations, unnecessaryly arrange a plurality of permanent magnets independently of one another, make and simplify.

As above explanation like that, according to present embodiment, first magnet and second magnet are installed on the vibrating body, or first magnet and second magnet be clamped between a pair of vibrating body, therefore obtain making the thinner effect of thickness of flat acoustic transducer self.

The magnetic line of force towards with the direction of vibration face almost parallel, towards with the magnetic line of force of the direction of vibration face almost parallel at first coil and the second coil interlinkage, therefore when first coil and the second coil midstream overcurrent, the electric current direction stressed from magnetic field roughly with vibration face quadrature, power along the direction of vibrating face becomes minimum, the effect that obtain reducing the noise composition, improves tonequality.

A plurality of first magnets and second magnet separate predetermined distance or are configured to contiguously when rectangular, with and the situation of the bar-shaped magnet of row arrangement compare, configurable a plurality of magnet, many times of coil number or magnet number identical with the magnet number, make length summation lengthening with the part of the magnetic line of force interlinkage of coil, improve the ratio of the occupied area of the coil on the vibrating mass face, the sound equipment conversion efficiency that is improved, and further improve the effect of tonequality.

(the tenth embodiment)

The following describes the tenth embodiment.Present embodiment has the framework 210 that constitutes from the case shape, is installed in edge 240 on the framework 210 by vibration to the vibrating membrane 230 of outside pronunciation with vibrating membrane 230 as shown in figure 39.

Framework 210 has as shown in figure 40: the wall 213 that the recess 211 of a plurality of permanent magnets 220 is set, surrounds installed surface 212 that the bottom surface of its openend ground and recess 211 be arranged in parallel, be provided with along the vertical direction of this face on the outer rim of installed surface 212 from the openend of recess 211.

Recess 211 is made of the perisporium 215 that substrate 214 that permanent magnet 220 is set as its bottom surface and encirclement substrate 214 form.

Will be roughly on the substrate 214 rectangular a plurality of permanent magnet 220 separate predetermined distance and be configured to rectangular.Specifically, as illustrating among first～the 9th embodiment, each permanent magnet 220 is arranged on the substrate 214, and the polarity different of feasible and adjacent permanent magnet 220 is towards vibrating membrane 230.

On the other hand, the magnetic line of force that comes out near the N utmost point of the permanent magnet 220 the perisporium 215 arrives the S utmost points by perisporium 215.Like this,, there is not the magnetic line of force to leak into the outside, the yet interlinkage magnetic line of force on the helical coil 231 of an end of vibrating membrane 230 because the perisporium 215 that surrounds each permanent magnet 220 is set.As permanent magnet 220, can use NdFeB series magnet and neodymium series magnet etc.

1 thin layer spare 216 that the applying nonmagnetic material constitutes on the face relative with the vibrating membrane 230 of each permanent magnet 220.Therefore, substrate 214 is covered by thin layer spare 216 with the state of clamping permanent magnet 220.Thin layer spare 216 for example is made of the flexibility with asbestos, mineral wool, nonwoven fabrics, Japan paper etc. and the material of aeration to a certain degree.And between thin layer spare 216 and vibrating membrane 230, form the air layer of specific thickness.The thickness of this air layer just contacts with thin layer spare 216 to well with vibrating membrane 230 when vibrating membrane 230 vibrates with peak swing.

Be provided with on the one side of vibrating membrane 230 and be wound into spiral helicine a plurality of helical coil 231.The center of each helical coil 231 is positioned on the approximate centre axle of each permanent magnet 220 when vibrating body 230 is installed on the framework 210.Each helical coil 231 is arranged to not overlap each other.

Helical coil 231 is wound into the outer rim similar shapes with the face of permanent magnet opposed 220.That is, the magnetic pole strength of the permanent magnet 220 of helical coil 231 corresponding cuboids is wound into roughly square.Each helical coil 231 coiling direction when relative with the identical polar of permanent magnet 220 is also identical.On the other hand, coiling direction is not different yet simultaneously in its polarity for helical coil 231.For example, helical coil 231 when the N that is positioned at permanent magnet 220 extremely goes up from periphery inwardly circumferentially right reel, when the S that is positioned at permanent magnet 220 extremely goes up from the inwardly circumferential left of periphery to coiling.

Thus, when flowing through electric current in helical coil 231, as shown in figure 40, the sense of current of adjacent peripheral part is identical.In addition, the adjacent peripheral part of each helical coil 231 passes through in the above-mentioned big magnetic line of force at this moment.Here, connect helical coil 231 or series connection and mixing in parallel by serial or parallel connection and be connected helical coil 231, dc resistance can be set to setting.

Such helical coil 231 by copper steam-plating film on vibrating membrane 230, by etching this copper film is formed helical form and forms.Substitute the copper steam-plating film, but pressing or joint Copper Foil or alternative etch copper film are laminated into coiled type with copper coating.And cover helical coil 231 with insulating material.

Vibrating membrane 230 is made of polymeric membranes such as polyamide, polyethylene terephthalate.The part that helical coil 231 is set of vibrating membrane 230 increases by coated ceramic, resist (for example epoxy system) hardness.

As shown in figure 39, edge 240 forms the frame shape.Specifically, the interior perimembranous 241 at edge 240 is similar to the outer rim of vibrating membrane 230, forms slightly forr a short time than the periphery of vibrating membrane 230.The peripheral part 242 at edge 240 is bigger than the outer rim of the upper end of recess 211, and littler than the periphery of installed surface 212.Form bend 243 as shown in figure 40 between inner peripheral surface 241 and the outer peripheral face 242, the section of the direction vertical with the face of vibrating membrane 230 bends to semicircle shape and is made of for example foam urethane and synthetic rubber etc.Bend 243 forms roughly with section that the situation of semicircle shape is that example is described, but can form for example other continuous shapes of mountain font, mountain font.

The interior perimembranous 241 at edge 240 is fixed in the peripheral part of vibrating membrane 230 above vibrating membrane 230.On the other hand, the peripheral part 242 at edge 240 is fixed in the periphery of recess 211 upper ends by clamping sept 244 above installed surface 212.At this moment, 240 limits, edge are to the fixing vibrating membrane 230 in tension force limit that vibrating membrane 230 applies regulation.

The bend 243 at edge 240 has sclerosis portion 245 because of the weight of vibrating membrane 230 is not lax in the regulation zone that long leg divides.Sclerosis portion 245 is than the modulus of elasticity height of other parts of bend 243.Therefore, the deflection of 245 pairs of external force of sclerosis portion is littler than other parts.

This edge 240 is for example by under the foaming urethane situation about constituting, following manufacturing.Here shown in Figure 41 A, the situation that forms sclerosis portion on the elongated tabular foaming urethane 246 is explained.

At first shown in Figure 41 A, the middle body of tabular foaming urethane 246 (forming the part of sclerosis portion) is gone up 1 of overlapping placement or polylith sclerosis portion foaming urethane sheet 247.Afterwards, compress tabular foaming urethane 246 and sclerosis portion foaming urethane sheet 247.After the compression, shown in Figure 41 b, form the tabular foaming urethane sheet 246 of specific thickness.Like this, tabular foaming urethane 246 middle bodies become sclerosis portion 245 than other partial density height.

Be under the elastomeric situation, only a part can not improve density.Therefore, shown in Figure 41 C, the thickness thickening of the middle body of tabular foaming synthetic rubber 248 (forming the part of sclerosis portion) comes moulding.

Vibrating membranes 230 are installed at edge 240 with bend 243 of such formation sclerosis portion 245, can prevent to relax because of its weight.Vibrating membrane 230 is parallel with the face of the thin layer spare 216 of the one side that covers permanent magnet opposed 220 in the state that is installed in edge 240 as a result for it.

The plane loudspeaker unit of Gou Chenging is when flowing through the electric current of voice signal in helical coil 231 like this, flow through in each helical coil 231 the sense of current as shown in figure 40.That is, the sense of current of the adjacent peripheral part of each helical coil 231 is identical.At this moment, in each helical coil 231, produce the power F that equates according to the faraday left hand rule towards top direction.Its as a result vibrating membrane 230 move to the direction vertical with its face, produce sound.

At this moment, vibrating membrane 230 moves to the direction vertical with its face from the state parallel with the face of the thin layer spare 216 of the one side that covers permanent magnet opposed 220.No matter its result is starting point with which position of vibrating membrane 230, all makes vibrating membrane 230 identical to the phase place of thin layer spare 216, can produce plane wave.

As mentioned above, the central part at edge 240 is made high density to present embodiment or thickening forms sclerosis portion 245, and therefore 216 phase place is usually identical from vibrating membrane 230 to thin layer spare.Vibrating membrane 230 distributes according to the acoustic pressure of the phase difference between it and does not produce distortion, the exportable sound that does not have the high-quality of noise composition as a result.

In the present embodiment, cover thin layer spare 216 on the magnetic pole strength of the permanent magnet 220 that hardness is high,, can suppress the noise that this reflect sound produces so reduce from the sound of thin layer spare 216 reflections.In addition, the plane loudspeaker unit inserts air layer between vibrating membrane 230 and thin layer spare 216, and is identical from the phase place of the sound of thin layer spare 216 reflection, prevents that vibrating membrane 230 from producing distortion, the sound of exportable high-quality.

The sclerosis portion 245 at edge 240 is not limited to be formed on a locational situation of the middle body on long limit, as shown in figure 42, can form in several position.As shown in figure 43, alternative frame type edge 240 can be provided with and form the outer warp elliptoid edge 240A similar with internal diameter.At this moment, sclerosis portion 245 can have a plurality of sclerosis portion 245.

As shown in figure 44, substitute vibrating membrane 230 and use the vibrating membrane 230A that on the table the inside, is provided with helical coil 231,231A.Specifically, be provided with on the upper face side of vibrating membrane 230A helical coil 231, helical coil 231A is set below it.The sense of current that helical coil 231A is wound into its peripheral part is identical with the sense of current of the peripheral part of the helical coil 231 relative with its upper face side, and is arranged on the vibrating membrane 230A.

Thus, helical coil 231, during the overcurrent of 231A upper reaches, (＞F) power increases voice output to act on F ' according to the faraday left hand rule on vibrating membrane 230A.

In the above embodiments, each permanent magnet 220 sky is opened predetermined distance and is arranged on the installed surface 212, but is not limited to this.For example, can increase slightly permanent magnet 220, not spaced apart permanent magnet 220 is arranged on the installed surface 212.

In the above embodiments, the situation that covers thin layer spare 216 has been described on the magnetic pole strength of permanent magnet 220, but has substituted the non-magnetic part that this can use tabular plastics etc., made the magnetic pole strength of permanent magnet 220 and the face between the magnetic pole for one side.

In the above-mentioned explanation, the plane loudspeaker unit of subtend helical coil 231 energising output sounds is described, but if flow through induced current according to the faraday right-hand rule in helical coil 231, then can be used as microphone.

The loud speaker edge of present embodiment is provided with the bend that elastomer constituted of the part bending between peripheral part and the interior perimembranous, the high elastic modulus part higher than peripheral part modulus of elasticity is set at least a portion of the length direction of described bend, make that the high elastic modulus part is little to the deflection of external force, size regardless of vibrating membrane, do not produce laxly, can support vibrating membrane.Vibrating membrane output does not as a result have the plane wave of phase difference, the sound of exportable high-quality.

The plane loudspeaker unit of present embodiment is by being provided with the bend that elastomer constituted with the part bending between peripheral part and the interior perimembranous, at least a portion loud speaker edge little of the length direction of described bend of while to the deflection of external force, even vibrating membrane is big and elongated shape, vibrating membrane and substrate be almost parallel also.The result can not produce lax and support vibrating membrane, and therefore output does not have the plane wave of phase difference, and the sound of output high-quality.

The edge of present embodiment explanation is also applicable to above-mentioned the 7th embodiment.

In the various embodiments described above, the example that uses vibrating membrane has been described, but the oscillating plate that alternative vibrating membrane uses the plate that aluminium sheet, paper phenol makes etc. to form.In the various embodiments described above under the situation of contact configuration permanent magnet, be preferably in the hole that wears on the part of 4 bights contacts of permanent magnet by sound.

(the 11 embodiment)

The 11 embodiment then is described.The plane loudspeaker unit of present embodiment has as shown in figure 45: first substrate 50 that the rectangular plate shape parts that magnetic constitutes constitute; Have the flexibility of asbestos, mineral wool, nonwoven fabrics and Japan paper etc. and aeration to a certain degree nonmagnetic material thin layer spare 52 and second substrate, 54, the first substrates 50 of conductor are set and second substrate 54 between insert thin layer spare 52 and one is installed first substrate 50, thin layer spare 52 and second substrate 54.

As shown in figure 46, make the magnetic pole strength of the S utmost point and the magnetic pole strength of the N utmost point alternately be arranged in rectangular by the part magnetization on the substrate 50 towards same side.Wear circular port 50A on 4 mutual position contacting of magnetic pole strength.

Second substrate 54 also can use cork wood lightweight hardboards such as (balsa) except that the flexible thin layer spare that the nonmagnetic material of the vibrating membrane of above-mentioned explanation etc. constitutes.What the conductor that disposes on second substrate illustrated in the various embodiments described above forms the spiral helicine coil, as shown in figure 47, can use on the position of the interlinkage magnetic line of force, i.e. the lead 56 that is provided with along the position corresponding with the border of adjacent magnetic pole strength.This lead is made of continuous 1 or many conductors, and the relation that will flow through the direction of the sense of current and the interlinkage magnetic line of force on second substrate is configured to mutually the same.Therefore, with the magnetic line of force and the lead interlinkage of the first type surface almost parallel of first substrate.

It is identical with the relation of the direction of the interlinkage magnetic line of force to flow through sense of current, therefore when the lead of the interlinkage magnetic line of force is switched on, the electric current that flows through lead is subjected to unidirectional power from the magnetic line of force, first substrate 50, thin layer spare 52 and the vibration of second substrate, 54 one are exported the plane wave that does not have phase difference from the loudspeaker unit of present embodiment.

When but the face with the first substrate opposite side of second substrate of this loudspeaker unit is fitted on the vibrating mass that constitutes than the big nonmagnetic material of second substrate, but vibrating mass resonance produces the sound of high output.But vibrating mass can use casing, plate, anti-roof accumulated snow down slide device (snowboard), the calendar that is made of wood, corrugated board, foaming urethane, plastics, glass, aluminium, hard board, FPP, porous plate etc.But but the vibrating mass of loudspeaker unit can be installed on the roof bigger than this vibrating mass, bed, wall, independent bathroom (unit bath), the show window (show window) etc.

Claims

1. flat acoustic transducer comprises:

Be configured to first magnetic pole strength, first magnet parallel with predetermined surface;

Second magnet with described first magnet interval predetermined distance is provided with makes that the second magnetic pole strength relatively described predetermined surface different with the polarity of described first magnetic pole strength is parallel, and towards the side identical with first magnetic pole strength of described first magnet;

Be configured to the vibrating mass relative with second magnetic pole strength with described first magnetic pole strength;

Form helical form, be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place first coil of spiral inner periphery and the outer periphery simultaneously with described first magnetic pole strength;

Form helical form, be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place second coil of spiral inner periphery and the outer periphery simultaneously with described second magnetic pole strength.

2. flat acoustic transducer according to claim 1, it is characterized in that, comprise and be configured on a side of described first magnetic pole strength and second magnetic pole strength and with the flexible air layer that described vibrating mass forms the air layer of specific thickness, form parts at described vibrating mass.

3. flat acoustic transducer according to claim 1 and 2 is characterized in that, flows through the electric current of equidirectional in the part of joining with described first coil of the part of joining with described second coil of described first coil and described second coil.

4. flat acoustic transducer according to claim 1 and 2, it is characterized in that, when the coiling direction of described first coil and the interior circumferential periphery of described second coil is identical, is connecting between interior all sides of described first coil and described second coil or between the outer circumferential side of described first coil and described second coil, connecting.

5. flat acoustic transducer according to claim 1 and 2, it is characterized in that, at the coiling direction of the interior circumferential periphery of described first coil and described second coil not simultaneously, do not connect the interior all sides and another the outer circumferential side of one of described first coil and described second coil or between interior all sides of described first coil and described second coil, connect and between outer circumferential side, connect.

6. flat acoustic transducer according to claim 1 and 2, it is characterized in that, dispose a plurality of magnet row that constitute along described first magnet of first direction alternate configurations and described second magnet, make on the second direction of intersecting with described first direction described first magnet and the described second magnet alternate configurations.

7. flat acoustic transducer according to claim 3, it is characterized in that, dispose a plurality of magnet row that constitute along described first magnet of first direction alternate configurations and described second magnet, make on the second direction of intersecting with described first direction described first magnet and the described second magnet alternate configurations.

8. flat acoustic transducer according to claim 4, it is characterized in that, dispose a plurality of magnet row that constitute along described first magnet of first direction alternate configurations and described second magnet, make on the second direction of intersecting with described first direction described first magnet and the described second magnet alternate configurations.

9. flat acoustic transducer according to claim 5, it is characterized in that, dispose a plurality of magnet row that constitute along described first magnet of first direction alternate configurations and described second magnet, make on the second direction of intersecting with described first direction described first magnet and the described second magnet alternate configurations.

10. according to any described flat acoustic transducer among claim 1,2, the 7-9, it is characterized in that the hardness height of the part on the vibrating mass beyond this configuration section of hardness ratio of the configuration section of the described coil of configuration.

11. flat acoustic transducer according to claim 3 is characterized in that, the hardness height of the part on the vibrating mass beyond this configuration section of hardness ratio of the configuration section of the described coil of configuration.

12. flat acoustic transducer according to claim 4 is characterized in that, the hardness height of the part on the vibrating mass beyond this configuration section of hardness ratio of the configuration section of the described coil of configuration.

13. flat acoustic transducer according to claim 5 is characterized in that, the hardness height of the part on the vibrating mass beyond this configuration section of hardness ratio of the configuration section of the described coil of configuration.

14. flat acoustic transducer according to claim 6 is characterized in that, the hardness height of the part on the vibrating mass beyond this configuration section of hardness ratio of the configuration section of the described coil of configuration.

15., it is characterized in that described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes according to any described flat acoustic transducer among claim 1,2,7-9, the 11-14.

16. flat acoustic transducer according to claim 3 is characterized in that, described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes.

17. flat acoustic transducer according to claim 4 is characterized in that, described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes.

18. flat acoustic transducer according to claim 5 is characterized in that, described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes.

19. flat acoustic transducer according to claim 6 is characterized in that, described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes.

20. flat acoustic transducer according to claim 10 is characterized in that, described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes.

21. a flat acoustic transducer comprises:

Be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place the spiral inner periphery and the outer periphery, and form spiral helicine first coil with first magnetic pole strength;

Be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place the spiral inner periphery and the outer periphery with described first magnetic pole strength, be configured in described vibrating mass with the described first coil position overlapped on, the interior week end connection of described first coil of interior Zhou Duanyu, and form and rightabout spiral helicine second coil of described first coil;

Be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place the spiral inner periphery and the outer periphery with described second magnetic pole strength, be configured on the described vibrating mass, and outer circumference end is connected with the outer circumference end of described second coil, and forms the spiral helicine tertiary coil with the described second coil equidirectional;

Be configured on the position at the corresponding position of the outer rim that clamps described vibrating mass, place the spiral inner periphery and the outer periphery with described second magnetic pole strength, and be configured in described vibrating mass with described tertiary coil position overlapped on, the interior week end of the described tertiary coil of interior Zhou Duanyu connects, and forms spiral helicine the 4th coil with the described first coil equidirectional.

22. flat acoustic transducer according to claim 21, it is characterized in that, comprise and be configured on a side of described first magnetic pole strength and second magnetic pole strength and with the flexible air layer that described vibrating mass forms the air layer of specific thickness, form parts at described vibrating mass.

23. according to claim 21 or 22 described flat acoustic transducers, it is characterized in that, described first coil configuration is on the one side of described vibrating mass, described second coil configuration is on the another side of described vibrating mass and hold the described vibrating mass of perforation to be connected with holding in interior week of described first coil in interior week, described tertiary coil is configured on the described another side of described vibrating mass, and described the 4th coil configuration is on the described one side of described vibrating mass and hold the described vibrating mass of perforation to be connected with holding in interior week of described tertiary coil in interior week.

24. according to claim 21 or 22 described flat acoustic transducers, it is characterized in that, dispose a plurality of magnet row that constitute along described first magnet of first direction alternate configurations and described second magnet, make on the second direction of intersecting with described first direction described first magnet and the described second magnet alternate configurations.

25. flat acoustic transducer according to claim 23, it is characterized in that, dispose a plurality of magnet row that constitute along described first magnet of first direction alternate configurations and described second magnet, make on the second direction of intersecting with described first direction described first magnet and the described second magnet alternate configurations.

26., it is characterized in that the hardness height of the part on the vibrating mass beyond this configuration section of hardness ratio of the configuration section of the described coil of configuration according to any described flat acoustic transducer in the claim 21,22,25.

27. flat acoustic transducer according to claim 23 is characterized in that, the hardness height of the part on the vibrating mass beyond this configuration section of hardness ratio of the configuration section of the described coil of configuration.

28. flat acoustic transducer according to claim 24 is characterized in that, the hardness height of the part on the vibrating mass beyond this configuration section of hardness ratio of the configuration section of the described coil of configuration.

29., it is characterized in that described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes according to any described flat acoustic transducer in the claim 21,22,25,27,28.

30. flat acoustic transducer according to claim 23 is characterized in that, described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes.

31. flat acoustic transducer according to claim 24 is characterized in that, described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes.

32. flat acoustic transducer according to claim 26 is characterized in that, described first magnet and described second configurations of magnets are on the plate-shaped member that magnetic constitutes.